What to do with vaporization when the instrument air is cut off?

When the instrument air supply to the system is cut off, if an interlock mechanism for low instrument air pressure is in place, the system will stop automatically. In the absence of such an interlock, the entire gasification system will close due to the spring return action of the valves in the safety system, resulting in a shutdown of the system. At this point, it is important for the control room and operators on site to ensure a steady supply of quench water and burner cooling water. Under normal circumstances, the self-regulating valves in the quench water pipelines will open fully when the air supply is cut off. Additionally, the valve positions of these self-regulating valves must be set properly after the system is started, to prevent them from closing in case of malfunctions. The shut-off valves for burner cooling water should remain open even in the event of a power or air supply failure. All other handling procedures should follow the standard shutdown procedures. Each company should have detailed emergency plans for such situations, so that all operators can handle them effectively.

Oh, so those vaporization valves are part of the safety system?

In a normally designed gasifier pipeline system, the oxygen pipeline valve is set to shut down in case of an accident, while the steam pipeline valve can be configured to remain in its original position or to shut down depending on the circumstances. In the case of a pressurized gasifier, especially those with water jackets, it is necessary to maintain pressure, so the raw gas pressure valve must be set to shut down in case of an accident; the jacket water control valve, on the other hand, can remain in its original position during such situations

Reply 1# Dove.cn: Instrument air must be equipped with interlocks